430nm DPSS blue laser generated by sum-frequency mixing

An all-solid-state blue laser at 430nm generated by intracavity sum-frequency mixing of a Nd: YAG laser emitting at 1319nm and a Pr:YLF laser at 639.5nm is presented. The continuous output power of 430nm is over 190mW which is the highest laser power emitting at this wavelength according to current report. The Nd: YAG and Pr:YLF crystal was pumped by a 5.9W 808nm and a 3.0W 444nm laser diode respectively. The optical-to-optical conversion efficiency is 2.1%.